A medical student receives a COVID-19 vaccine at Dell Medical School in Austin. Central Texas is far from herd immunity for COVID-19, and public health officials are urging everyone who can to get vaccinated. Most sites are now giving away first doses without an appointment, though some are offering reserved appointments as well. Here's where you can go this weekend to get a shot. Delco Activity Center Austin Public Health is running its vaccination site at the Delco Activity Center on Saturday. As of this week, it's now a walk-up site, so anyone 18 or older looking to get a dose of the Moderna vaccine can do so between noon and 8 p.m. If you can't make it this weekend, the site is open from Tuesday through Saturday from noon to 8 p.m.